hardline nutrition l carnitine 500 mg L-Karnitin Thermo and dairy Jarrow Formulas L-Carnitine, 500 mg,100

J Clin Invest 113(1):2527

The first step is likely catalyzed by glutamatecysteine ligase (Gcs1), which catalyzes the condensation of Cys and glutamate to form -glutamylcysteine, which is then converted to GSH by the addition of Gly to the C-terminal of -glutamylcysteine by glutathione synthase (Gsh2) ( the source of 4-phosphopantetheine for essential post-translational activation of non-ribosomal peptide synthetases and polyketide synthases in fungi (Stack et al., 2009

If a previously effective concentration suddenly yields poor results, and you can rule out other variables, peptide degradation is a likely suspect

But every level of that progression matters, and skipping steps or delaying entry doesn't lead to better outcomes it leads to worse ones